EP3838722B1 - Faux châssis pour un véhicule automobile - Google Patents

Faux châssis pour un véhicule automobile Download PDF

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Publication number
EP3838722B1
EP3838722B1 EP19218436.4A EP19218436A EP3838722B1 EP 3838722 B1 EP3838722 B1 EP 3838722B1 EP 19218436 A EP19218436 A EP 19218436A EP 3838722 B1 EP3838722 B1 EP 3838722B1
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EP
European Patent Office
Prior art keywords
extruded
beams
subframe
cast
connecting element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19218436.4A
Other languages
German (de)
English (en)
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EP3838722A1 (fr
Inventor
Zidane Tahir
Raymond Aso
Tom Richford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autotech Engineering Deutschland GmbH
Original Assignee
Autotech Engineering Deutschland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autotech Engineering Deutschland GmbH filed Critical Autotech Engineering Deutschland GmbH
Priority to EP19218436.4A priority Critical patent/EP3838722B1/fr
Priority to US17/123,324 priority patent/US11453441B2/en
Priority to CN202011502244.1A priority patent/CN113002621B/zh
Publication of EP3838722A1 publication Critical patent/EP3838722A1/fr
Application granted granted Critical
Publication of EP3838722B1 publication Critical patent/EP3838722B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B62D21/03—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members transverse members providing body support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D27/00—Connections between superstructure or understructure sub-units
    • B62D27/02—Connections between superstructure or understructure sub-units rigid
    • B62D27/023—Assembly of structural joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames
    • B62D21/155—Sub-frames or underguards

Definitions

  • the invention relates to a subframe for a motor vehicle, having at least three supports, of which at least two supports extend at a distance from one another, essentially along the longitudinal axis of the motor vehicle when the subframe is in the installed state, and at least one support extends transversely to the longitudinal axis of the motor vehicle, with at least one of the carriers is an extruded carrier, and at least one cast node made of aluminum, magnesium or an alloy based on aluminum and/or magnesium, the cast node connecting the extruded carrier and at least one of the other carriers to one another, the cast node being an arm-shaped carrier -Has connection element, wherein the extruded carrier overlaps the carrier-connection element, and wherein the extruded carrier is connected to the carrier-connection element by a weld seam.
  • Auxiliary frames for motor vehicles also called axle carriers
  • axle carriers are known in many different designs. They should be as light as possible with high strength and rigidity and usually have link connections (bearing mounts) for wheel control elements and other units in order to enable the installation of complete front or rear axle modules with drive units as a pre-assembled unit.
  • subframes are assembled from side members and cross members made of steel materials and welded to one another.
  • subframes are also known whose longitudinal members and cross members are made of aluminum materials.
  • longitudinal member is understood here to mean supporting elements or sections of supporting elements of the subframe which, when the subframe is installed, essentially extend along the longitudinal axis of the motor vehicle in question and thus essentially in the direction of travel
  • Cross beams are understood to mean supporting elements or sections of supporting elements of the subframe which, when the subframe is installed, extend transversely to the longitudinal axis of the motor vehicle and thus transversely to the direction of travel.
  • a subframe which has a plurality of cast nodes which connect a left-hand and a right-hand side member and a cross member to one another.
  • the cast nodes consist z. B. made of cast aluminum and have a longitudinal beam connection point and a tubular designed cross member connection point.
  • the cross member is designed as an extruded profile or an open profile.
  • the cross member is welded to the cross member connection point in the lap joint by means of friction stir welding.
  • the side member on the other hand, is connected to the side member connection point by means of screws or, alternatively, also welded by means of friction stir welding.
  • the invention is based on the object of further improving a subframe of the type mentioned at the outset with regard to high strength and service life and low weight of the subframe.
  • the subframe according to the invention is characterized in that the cast node on the carrier connection element has a shoulder which defines a shoulder front side, the shoulder front side on the one hand and the extruded support and/or the weld seam on the extruded support on the other hand delimiting a groove-shaped or trench-shaped depression whose width or average width at least 2.5 times, preferably at least 3.5 times, particularly preferably at least 4 times the wall thickness of the extruded carrier, and the weld seam is designed as an overlap seam.
  • the invention is based on the idea of improving the fatigue strength and service life of the subframe and/or reducing the weight of the subframe by positioning and designing the weld seam that connects the extruded crossmember or longitudinal member to the cast node while the subframe is easy to manufacture.
  • the inventors have recognized that this can be achieved through the above-mentioned characterizing features of the subframe according to the invention.
  • the inventors have recognized that when driving a motor vehicle equipped with the subframe, the stresses occurring in the area of the weld seam are relatively small due to the groove- or trench-shaped depression with the specified minimum width, and that because of the stress-reduced position of the weld seam, the wall thickness of the extruded transverse or side members can be greatly reduced.
  • the upper limit of the (average) width of the groove- or trench-shaped indentation can be, for example, 20 times, preferably 15 times, in particular 10 times the wall thickness of the extruded carrier.
  • the weld seam for the integral connection of the extruded cross member or longitudinal member with the cast node of the subframe according to the invention can be made, for example, by inert gas welding, in particular as MIG welding or MAG welding, or by other welding methods, such as laser welding, preferably with additional wire, or laser arc -Hybrid welding, to be carried out.
  • the groove or ditch-shaped depression with the minimum width specified above offers the particular advantage that the joint (joint edge of the lap joint) at which the welded connection of the extruded cross or longitudinal member with the cast node is made is more accessible.
  • the groove or trench-shaped indentation with the minimum width specified above offers the advantage that the thickness of the weld seam can be increased in the form of an overlap seam without causing welding defects (e.g. burn-through or excessive penetration at the weld seam, or a Weld offset) comes.
  • An advantageous embodiment of the subframe according to the invention provides that it has at least four carriers, of which at least two carriers extend at a distance from one another, essentially along the longitudinal axis of the motor vehicle, and at least two carriers extend at a distance from one another, transversely to the longitudinal axis of the motor vehicle, the the two supports extending essentially along the longitudinal axis of the motor vehicle and/or the two supports extending transversely to the longitudinal axis of the motor vehicle are designed in accordance with the extruded support, with at least four cast nodes corresponding to said cast node being present, which together with the supports form a closed frame structure define, and wherein the extruded beams are connected to the casting nodes in such a way that at least one of the said groove-shaped or ditch-shaped depression results in each case at least one depression corresponding to the said groove-shaped depression.
  • This configuration offers the advantage that the subframe can absorb high dynamic forces, and this with a significantly reduced weight compared to conventional subframes with a closed frame structure.
  • a further advantageous embodiment of the auxiliary frame provides that the respective extruded support is designed as a closed hollow profile. This design allows a very large reduction in the weight of the subframe with high subframe rigidity.
  • a further advantageous embodiment of the invention provides that the weld seam is designed as a circumferential overlap seam.
  • a further advantageous embodiment of the subframe provides that the respective extruded support is made of aluminum, magnesium or an alloy based on aluminum and/or magnesium. This configuration also contributes to reducing the weight of the subframe.
  • the respective carrier connection element is designed in the form of a pipe socket.
  • the pipe-socket-shaped carrier connection element preferably has a cylindrical plug-in section, which engages in the extruded carrier with a precise fit.
  • This plug-in connection is preferably designed in such a way that an axial section of the extruded carrier is initially axially displaceable relative to the plug-in section of the carrier connection element and, if necessary, adjustable to compensate for manufacturing tolerances, until the material-to-material connection is then made by producing the weld seam (overlap seam).
  • the cylindrical plug-in section can have, for example, an oval, elliptical, circular, ring-shaped or multiple curved section hollow cross-sectional profile, with the extruded carrier having a matching hollow cross-sectional profile in each case.
  • the support-connecting element of the cast node in the region of the groove or trench-shaped depression has a wall thickness which is equal to or greater than the wall thickness of the extruded support, e.g. B. longitudinal member is.
  • This configuration has a very positive effect on the quality of the weld seam. Because the relatively large The wall thickness of the carrier connection element in the area of the groove- or trench-shaped indentation offers the advantage that the thickness or cross-sectional area of the overlap seam can be increased without welding defects of the type mentioned above occurring.
  • the cast node is produced, for example, using the low-pressure casting process, whereupon surface treatment, for example machining or machining, is then carried out at least in the area of the carrier connection element.
  • surface treatment for example machining or machining
  • the minimum wall thickness of the cast node in the area of the carrier connection element is, for example, approx. 4.5 mm after surface treatment.
  • the carrier-connecting element has a wall thickness in the area of the groove or ditch-shaped depression which is between 1.2 times and 3 times, preferably between 1.5 times and 2.5 times the wall thickness of the extruded carrier is located.
  • This configuration has a particularly positive effect on the quality of the weld seam.
  • a further advantageous embodiment of the subframe according to the invention provides that the respective carrier connection element has a first essentially axial cast node section and a second essentially axial cast node section, with the second axial cast node section being welded to the extruded carrier and having a smaller external dimension, preferably a smaller one Outside diameter than the first cast axial node portion, and wherein the outside dimension or outside diameter of the first axial cast node portion is greater than or equal to the product of the outside dimension or outside diameter of the second axial cast node portion and 1.3 times the wall thickness of the extruded beam.
  • An embodiment is particularly advantageous in this case wherein the outside dimension or outside diameter of the first axial casting node portion is greater than or equal to the outside dimension or outside diameter of the extruded beam.
  • a further advantageous embodiment of the auxiliary frame provides that the respective beam connection element has a constriction, preferably a circumferential constriction, on the inside at the end of the first axial cast node section facing away from the extruded beam.
  • the extruded carrier overlaps the carrier connection element with an axial dimension which is less than or equal to the width or average width of the groove-shaped or trench-shaped depression.
  • a further advantageous embodiment of the subframe provides that the respective extruded carrier has one or more through openings in its profile wall, which are arranged at a distance from the carrier connection element and open out downwards when the subframe is in the intended installation position.
  • the through-openings allow liquid that has penetrated into the extruded carrier to be drained off.
  • the through openings reduce the weight of the extruded beam and thus of the subframe.
  • the supports 3, 4, 6, 7 are connected to one another via cast nodes 9, 10, 11, 12, the cast nodes 9, 10, 11, 12 together with the supports 3, 4, 6, 7 defining a closed frame structure.
  • Reference number 13 designates a further optional cross member, which is connected to cast node 11, 12 at the rear in the direction of travel V.
  • the cast nodes 9,10,11,12 are provided with socket-like connection elements 9.1, 10.1, 11.1,12.1, which are used to hold screws, so that the subframe 1 can be mounted on a vehicle body using screw connections.
  • the cast nodes 9, 10 at the front in the direction of travel V also have socket-like connection elements 9.2, 9.3, 10.2, 10.3 for connecting wheel control elements (not shown), also called chassis or wishbones, and also brackets 9.8 10.8 for connecting an engine or other drive unit .
  • the cast nodes 9, 10, 11, 12 are cast from aluminum, magnesium or an alloy based on aluminum and/or magnesium. Furthermore, in the in 1 In the exemplary embodiment shown, at least the longitudinal beams 3, 4 are produced as extruded beams in the form of extruded profiles made of aluminum, magnesium or an alloy based on aluminum and/or magnesium.
  • the crossbeams 6, 7 are preferably also produced as extruded profiles from a corresponding light metal or a corresponding light metal alloy.
  • Both the front cast nodes 9, 10 and the rear cast nodes 11, 12 have arm-shaped support connection elements 9.4, 10.4, 11.4, 12.4, onto which the extruded supports, in this exemplary embodiment the longitudinal supports 3, 4, are attached, so that the respective end of the longitudinal member 3, 4 overlaps the associated carrier connection element 9.4, 10.4, 11.4, 12.4.
  • the carrier connection elements 9.4, 10.4, 11.4, 12.4 are designed in the form of pipe sockets.
  • the respective longitudinal beam 3, 4 is connected to the carrier connection element 9.4, 10.4,11.4,12.4 of the respective cast node 9, 10, 11, 12 by a weld seam welded in the form of an overlap seam 14.
  • the cast node 9, 10, 11, 12 has a shoulder on the carrier connection element 9.4, 10.4, 11.4, 12.4, which defines a shoulder face 16.
  • the front end of the extruded longitudinal member 3, 4 is positioned on the carrier connection element 9.4, 10.4, 11.4, 12.4 in such a way that the shoulder front side 16 on the one hand and the longitudinal member 3, 4 and/or the weld seam (overlap seam) 14 on the front end of the longitudinal member 3, 4 on the other hand limit a groove or trench-like depression 17 whose width or average width W is at least 2.5 times, preferably at least is 3.5 times, particularly preferably at least 4 times, the wall thickness te of the extruded carrier.
  • the average width or breadth W can also be referred to as the axial offset of the front end of the side member 3, 4 relative to the shoulder front side 16 of the carrier connection element 9.4, 10.4, 11.4, 12.4.
  • the longitudinal beam 3, 4 overlaps the beam-connecting element 9.4, 10.4, 11.4, 12.4 with an axial dimension l o which is less than or equal to the width or average width W of the groove or trench-shaped depression 17.
  • the longitudinal beams 3, 4 and/or the cross beams 6, 7 are preferably designed as closed hollow profiles.
  • the side members 3, 4 have, for example, a closed cross-sectional profile, which is composed of essentially straight and curved profile sections (cf. figures 2 and 3 ).
  • the weld seam 14 is preferably designed as a circumferential overlap seam.
  • the section 18, 19 of the carrier connection element 9.4, 10.4, 11.4, 12.4 that is inserted into the respective end of the longitudinal member 3, 4 has essentially the same cross-sectional profile shape as the longitudinal member 3, 4, but with an external dimension or external diameter d1 which/ which is slightly smaller than the inner dimension or the inner diameter d3 of the extruded longitudinal member 3, 4.
  • the extruded longitudinal member 3, 4 can also have another closed cross-sectional profile, for example a substantially circular, oval or elliptical hollow profile, or an open cross-sectional profile, for example, have a U-shaped, V-shaped or C-shaped cross-sectional profile.
  • the front cross member 7 in the direction of travel V is designed, for example, as a rectangular hollow profile, while the rear cross member 6 is designed, for example, as an essentially oval or polygonal hollow profile.
  • the front cast nodes 9, 10 and also the rear cast nodes 11, 12 each have a plurality of recesses 9.6, 9.7, 10.6, 10.7 and/or chambers 11.6, 11.7, 12.6, 12.7. These give the respective casting nodes 9, 10, 11, 12 a high level of rigidity, in particular flexural rigidity, with a relatively low weight.
  • the beam connection elements 9.4 and 11.4 of the cast nodes 9 and 11 each have a wall thickness tc in the area of the groove or trench-shaped depression 17, which is preferably equal to the wall thickness te or thicker than the wall thickness te of the extruded longitudinal beam 4.
  • the carrier connection element 9.4 or 11.4 has a wall thickness tc in the area of the groove- or trench-shaped depression 17, which is preferably between 1.2 times and 3 times, particularly preferably between 1.5 times and 2 5 times the wall thickness te of the extruded carrier 4 is.
  • the minimum wall thickness tc in the area of the carrier connection element 9.4 is approximately 4.5 mm, for example.
  • the respective carrier connection element 9.4, 11.4 has a first essentially axial cast node section 9.41, 11.41 and a second essentially axial cast node section 9.42, 11.42, the second axial cast node section 9.42, 11.42 being welded to the extruded longitudinal member 4 and a smaller one Outer dimension, for example, has a smaller outer diameter d1 than the first axial cast node section 9.41, 11.41.
  • the outer dimension or the outer diameter d2 of the first axial cast node section 9.41, 11.41 is, for example, greater than or equal to the product of the outer dimension or outer diameter d1 of the second axial cast node section 9.42, 11.42 and 1.3 times the wall thickness te of the extruded longitudinal member 4 .
  • the external dimension or the external diameter d2 of the first axial cast node section 9.41, 11.41 is greater than or equal to the external dimension or external diameter d4 of the extruded longitudinal member 4 (cf. Figures 4 and 5 ).
  • the cast node 11 is designed in such a way that the beam connection element 11.4 has a constriction 20 on the inside at the end of the first axial cast node section 11.41, which end faces away from the longitudinal beam 4 .
  • the constriction 20 can be as a bottom bulge on the inside or as a circumferential constriction (Inside rib) be designed.
  • the front casting node 9 has a similar constriction 20 .
  • the longitudinal beam 4 has a plurality of through openings 4.1, 4.2 in its profile wall, which are arranged at a distance from the carrier connection element 9.4, 11.4 and open out in the intended installation position of the subframe 1 downwards.
  • At least one of the crossbeams 6, 7 can also be designed as an extruded beam, preferably a hollow profile beam, and be connected to the assigned cast nodes 9, 10, 11, 12 in such a way that the beam connection element of the cast node 9, 10, 11, 12 a shoulder is formed, which defines a shoulder end face 16, whereby the shoulder end face 16 on the one hand and the extruded crossbeam 6, 7 and/or the overlapping seam 14 on the extruded crossbeam 6, 7 on the other hand delimit a groove or trench-shaped depression 17, the width or average width of which is at least 2.5 times, preferably at least 3.5 times, particularly preferably at least 4 times the wall thickness te of the extruded cross member 6, 7.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Claims (13)

  1. Faux-châssis (1) pour un véhicule automobile présentant
    - au moins trois supports (3, 4, 6, 7) dont, à l'état monté du faux-châssis (1), au moins deux supports (3, 4) sont espacés l'un de l'autre, s'étendent essentiellement le long de l'axe longitudinal du véhicule automobile et au moins un support (6, 7) s'étend transversalement à l'axe longitudinal du véhicule automobile, dans lequel au moins l'un des supports (3, 4, 6, 7) est un support extrudé (3, 4), et
    - au moins un nœud de coulée (9, 10, 11, 12) en aluminium, en magnésium ou en alliage à base d'aluminium et / ou magnésium,
    dans lequel le nœud de coulée (9, 10, 11, 12) relie ensemble le support extrudé (3, 4) et au moins l'un des autres supports (6, 7),
    dans lequel le nœud de coulée (9, 10, 11, 12) présente un élément de raccordement de support (9.4, 10.4, 11.4, 12.4) conçu en forme de bras,
    dans lequel le support extrudé (3, 4) recouvre l'élément de raccordement de support (9.4, 10.4, 11.4, 12.4), et
    dans lequel le support extrudé (3, 4) est relié à l'élément de raccordement de support (9.4, 10.4, 11.4, 12.4) par un cordon de soudure (14),
    caractérisé en ce que le nœud de coulée (9, 10, 11, 12) présente, au niveau de l'élément de raccordement de support (9.4, 10.4, 11.4, 12.4), un gradin qui définit une face frontale de gradin (16), dans lequel la face frontale de gradin (16), d'une part, et le support extrudé (3, 4) et / ou le cordon de soudure (14) sur le support extrudé (3, 4), d'autre part, délimitent une cavité en forme de rainure ou de fossé (17), dont la largeur ou largeur moyenne (W) s'élève au moins à 2,5 fois, de préférence au moins 3,5 fois, de préférence encore au moins à 4 fois l'épaisseur de paroi (te) du support extrudé (3, 4), et dans lequel le cordon de soudure (14) est réalisé comme un cordon de recouvrement.
  2. Faux-châssis selon la revendication 1, caractérisé par au moins quatre supports (3, 4, 6, 7), dont au moins deux supports (3, 4) sont espacés l'un de l'autre, s'étendent essentiellement le long de l'axe longitudinal du véhicule automobile et au moins deux supports (6, 7) s'étendent en étant espacés l'un de l'autre, transversalement à l'axe longitudinal du véhicule automobile, dans lequel les deux supports (3, 4) s'étendant essentiellement le long de l'axe longitudinal du véhicule automobile et / ou les deux supports (6, 7) s'étendant transversalement à l'axe longitudinal du véhicule automobile sont réalisés en correspondant au support extrudé, dans lequel au moins quatre nœuds de coulée (9, 10, 11, 12) sont présents en correspondant au dit nœud de coulée, qui définissent avec les supports (3, 4, 6, 7) une structure de cadre fermée, et dans lequel les supports extrudés sont reliés aux nœuds de coulée de sorte qu'il en résulte, sur les au moins quatre nœuds de coulée (9, 10, 11, 12), à chaque fois au moins une cavité correspondant à ladite cavité en forme de rainure ou de fossé (17).
  3. Faux-châssis selon la revendication 1 ou 2, caractérisé en ce que le support extrudé respectif (3, 4, 6, 7) est réalisé comme un profil creux fermé.
  4. Faux-châssis selon l'une des revendications 1 à 3, caractérisé en ce que le cordon de soudure (14) est réalisé comme un cordon de recouvrement périphérique.
  5. Faux-châssis selon l'une des revendications 1 à 4, caractérisé en ce que le support extrudé respectif (3, 4, 6, 7) est fabriqué en aluminium, en magnésium ou en alliage à base d'aluminium et / ou de magnésium.
  6. Faux-châssis selon l'une des revendications 1 à 5, caractérisé en ce que l'élément de raccordement de support respectif (9.4, 10.4, 11.4, 12.4) est réalisé en forme de tubulure.
  7. Faux-châssis selon l'une des revendications 1 à 6, caractérisé en ce que l'élément de raccordement de support (9.4, 10.4, 11.4, 12.4) présente, dans la zone de la cavité en forme de rainure ou de fossé (17), une épaisseur de paroi (tc) qui est égale à l'épaisseur de paroi (te) ou supérieure à l'épaisseur de paroi (te) du support extrudé (3, 4).
  8. Faux-châssis selon l'une des revendications 1 à 7, caractérisé en ce que l'élément de raccordement de support (9.4, 10.4, 11.4, 12.4) présente, dans la zone de la cavité en forme de rainure ou de fossé (17), une épaisseur de paroi (tc) qui se situe entre 1,2 fois et 3 fois, de préférence, entre 1,5 fois et 2,5 fois l'épaisseur de paroi (te) du support extrudé (3, 4).
  9. Faux-châssis selon l'une des revendications 1 à 8, caractérisé en ce que l'élément de raccordement de support respectif (9.4) présente une première section de nœud de coulée essentiellement axiale (9.41) et une deuxième section de nœud de coulée essentiellement axiale (9.42), dans lequel la deuxième section de nœud de coulée axiale (9.42) est soudée au support extrudé (4) et présente une dimension externe moindre, de préférence un diamètre externe (d1) moindre que la première section de nœud de coulée axiale, et dans lequel la dimension externe ou le diamètre externe (d2) de la première section de nœud de coulée axiale (9.41) est supérieure ou égale au produit de la dimension externe ou du diamètre externe (d1) de la deuxième section de nœud de coulée axiale et de 1,3 fois l'épaisseur de paroi (te) du support extrudé (4).
  10. Faux-châssis selon la revendication 9, caractérisé en ce que la dimension externe ou le diamètre externe (d2) de la première section de nœud de coulée axiale (9.41) est supérieure ou égale à la dimension externe ou diamètre externe (d4) du support extrudé (4).
  11. Faux-châssis selon la revendication 9 ou 10, caractérisé en ce que l'élément de raccordement de support respectif (9.4) présente à l'extrémité, opposée au support extrudé (4), de la première section de nœud de coulée axiale (9.41) du côté interne un rétrécissement (20), de préférence, un rétrécissement périphérique.
  12. Faux-châssis selon l'une des revendications 1 à 11, caractérisé en ce que le support extrudé (4) recouvre l'élément de raccordement de support (9.4) avec une dimension axiale (lo) qui est inférieure ou égale à la largeur ou largeur moyenne (W) de la cavité en forme de rainure ou de fossé (17).
  13. Faux-châssis selon l'une des revendications 1 à 12, caractérisé en ce que le support extrudé respectif (4) présente dans sa paroi profilée une ou plusieurs ouvertures de passage (4.1, 4.2) qui sont disposées à une certaine distance de l'élément de raccordement de support (9.4, 11.4) et débouchent vers le bas dans une position de montage en conformité avec sa spécification du faux-châssis (1).
EP19218436.4A 2019-12-20 2019-12-20 Faux châssis pour un véhicule automobile Active EP3838722B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19218436.4A EP3838722B1 (fr) 2019-12-20 2019-12-20 Faux châssis pour un véhicule automobile
US17/123,324 US11453441B2 (en) 2019-12-20 2020-12-16 Subframe for a motor vehicle
CN202011502244.1A CN113002621B (zh) 2019-12-20 2020-12-18 用于机动车的副车架

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EP19218436.4A EP3838722B1 (fr) 2019-12-20 2019-12-20 Faux châssis pour un véhicule automobile

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EP3838722B1 true EP3838722B1 (fr) 2022-03-16

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EP3838722B1 (fr) * 2019-12-20 2022-03-16 Autotech Engineering Deutschland GmbH Faux châssis pour un véhicule automobile

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US6470990B1 (en) * 2000-07-26 2002-10-29 Daniel E. Panoz Extruded vehicle chassis and method of making a chassis
US7520514B2 (en) * 2004-03-31 2009-04-21 Honda Motor Co., Ltd. Body frame structure
CZ2008248A3 (cs) * 2007-04-24 2008-11-05 Benteler Automobiltechnik Gmbh Zpusob výroby pomocného rámu, motorového vozidla,jakož i pomocný rám motorového vozidla
DE102009020305A1 (de) * 2008-05-26 2009-12-03 Ksm Castings Gmbh Achsträger für Kraftfahrzeuge
CN102395443A (zh) * 2009-04-15 2012-03-28 本田技研工业株式会社 铝合金部件的焊接接头
DE102011106250A1 (de) * 2011-07-01 2013-01-03 Audi Ag Hilfsrahmen für das Fahrzeugchassis von Kraftfahrzeugen
DE102012023363B4 (de) * 2012-11-29 2014-06-26 Audi Ag Hilfsrahmen für ein Kraftfahrzeug
DE102014101979B3 (de) * 2014-02-17 2014-12-11 Benteler Automobiltechnik Gmbh Verbindungsanordnung sowie Verfahren zur Herstellung einer Verbindungsanordnung und Kraftfahrzeugbauteil
US9352785B2 (en) * 2014-04-17 2016-05-31 Tesla Motors, Inc. Subframe configured to detach upon impact
DE102014108838B4 (de) * 2014-06-24 2017-09-14 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines partiell gehärteten Achshilfsrahmens
CN106184368B (zh) * 2014-08-08 2019-02-01 本田技研工业株式会社 副车架结构
EP3124362B1 (fr) * 2015-07-29 2017-12-13 Autotech Engineering Deutschland GmbH Faux-chassis, plus particulierement faux-chassis d'essieu arriere, pour un vehicule particulier
DE102016201815A1 (de) 2015-12-17 2017-06-22 Volkswagen Aktiengesellschaft Hilfsrahmen für ein Kraftfahrzeug
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EP3838722B1 (fr) * 2019-12-20 2022-03-16 Autotech Engineering Deutschland GmbH Faux châssis pour un véhicule automobile

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CN113002621B (zh) 2023-03-28
US20210188357A1 (en) 2021-06-24
US11453441B2 (en) 2022-09-27
EP3838722A1 (fr) 2021-06-23
CN113002621A (zh) 2021-06-22

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